| 摘要 |
PROBLEM TO BE SOLVED: To provide a fan motor controller quickly stopping rotation of a fan motor without allowing an excessive current to flow in a drive circuit of the fan motor when power is turned off regardless of a simple circuit configuration. SOLUTION: A braking circuit unit 2 includes a first braking circuit 3 for outputting a first braking signal to a drive control unit 12 when a supply voltage becomes not more than a first threshold and a second braking circuit 4 for outputting a second braking signal to the drive control unit 12 when the supply voltage becomes not more than a second threshold smaller than the first threshold. COPYRIGHT: (C)2011,JPO&INPIT |
